package com.lei2j.org;

/**
 * Created by lei2j on 2018/5/9.
 */
public  class Duck {
    public void swiming(){
        System.out.println("swim.....");
    }

    public void display(){};

    public void quack(){
        System.out.println("叫。。。。");
    }

    public void fly(){
        System.out.println("fly.....");
    }
}
